Re: gEDA-user: Parts Manager Working Document

[usenet@xxxxxxxxxx (Florian Teply)]

Gabriel Paubert <paubert@xxxxxxx> wrote:
> On Mon, Jan 18, 2010 at 11:05:02AM +0100, Florian Teply wrote:
>> Florian Teply <usenet@xxxxxxxxxx> wrote:
>> > On Saturday 16 January 2010 06:03:18 Edward Hennessy wrote:
>> >> On Jan 12, 2010, at 4:18 AM, Florian Teply wrote:
>> >> > I'm gonna try and make up a list of properties of components starting
>> >> > with passive devices. I'll go from very generic properties to more
>> >> > exotic ones in a way i guess will be okay with most users and put that
>> >> > list up for discussion.
>> >> 
>> >> Excellent.  Thanks.
>> >> 
>> > No prob, was about do do that anyways as i wanted to have such database for my 
>> > own use. Left it at work though, hopefully i'll have it in a state for 
>> > discussion by monday afternoon.
>> > 
>> Hmm, looks like i have finished said document, at least i can't think of
>> anything to add. Surely, it's not finished yet and does only cover
>> resistors, capacitors and inductors so far as i can't make up my mind
>> whether diodes should go with semiconductors or with passives...
>> Anyways, it is to be found at:
>> http://www.teply.info/gEDA/passive_properties.txt
>> Anny and all comments welcome, i'll add them to the document.
> 
> Consider that some inductances that I use are not symmetric. While
> I don't know of any asymmetric resistors (but maybe they exist), 
> some microwave broadband inductors are asymmetric (you can't swap 
> pins 1 and 2, as for polarized capacitors):
> 
> http://www.piconics.com/Conicals.html
> 
> Coilcraft has similar products. 
> 
I knew i forgot about something i've seen in some distant past... ;-)

> In other ways, for two terminal components, some are symmetric 
> dipoles, others are asymmetric. Diodes might fall in the second 
> category, but diacs might fall in the first.
> 
So, one could describe that as either asymmetry or sensitivity to
direction. Gotta think about that real soon now, and will update the
document as soon as i get home, have a train to catch now...

Greets,
Florian



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